Quantity   Component name
5 × Arduino pro mini
5 × Ultrasonic sensor
5 × Perfboard
5 × Vibrating motor
5 × Buzzers
5 × Red LEDs
5 × Switches
1 × Male and female header pins
4 × Jumper cable
1 × Power bank
1 × One 3.3 volt old mobile battery
1 × Some elastics and stickers (to make it as a band for wearing)